Saffi Eriksdotter + Ashnod's Altar + Sister Hospitaller

Saffi Eriksdotter

Ashnod's Altar

Sister Hospitaller

How it works

1. Activate Saffi by sacrificing it, targeting Sister Hospitaller
2. Activate Ashnod's Altar by sacrificing Sister Hospitaller
3. When Sister Hospitaller dies, Saffi triggers, returning Sister Hospitaller from your graveyard to the battlefield.
4. When Sister Hospitaller enters, it triggers, returning Saffi from your graveyard to the battlefield and causing you to gain 2 life.
5. Resolve the Ashnod's Altar ability.
6. Repeat.